I'm good with wikipedia, terrible with PDFs. I'm ok when it's on
  the computer, but once I print them out on paper, I get sleepy
  reading them.

  I've thought about a book reader; my mother has a really
  lightweight one that she loves - a nook I think - so lightweight
  it can actually qualify as electronic paper, unlike most of the
  readers which are crippled Androids, optimized for book reading.

  I still look forward to a waterproof, motion and light charging,
  touch screen reader that's about three millimeters thick, you
  can fold or roll up and it survives, and is tearproof and cheap
  enough to throw in the garbage.

  I'm thinking I'll be dead by the time someone does it, but
  someone will make it. It can't replace paper 'til someone can
  line a birdcage with it tongue emoticon   I first wrote up that
  idea for an Internet dumb terminal way back in 1990. I sat at
  the green screen and dremed of electronic paper. Oh and
  holographic too; the tearable one anyway. Each part could work
  as a full screen; but I knew that part was only a dream. I think
  without the tearable holographic part, the rest is plausible
  engineering.